Still has high risks though. Isn't dependable for a long period of time. You need to have a good sense on decision making on which coin to hold and dump. But yeah, it can help you grow your btc. 
I do not see any high risk here, it is just a matter as of shifting BTC to U.S Dollars and Vice versa. Comparing to fiat currencies altcoin are safer, so according to me doing business trading between alt coins and bitcoins will not harm, future is one and only for digital currencies.